Unseeded Marketa Vondrousova caused the biggest shock of Indian Wells so far, outplaying second seed Simona Halep to move into the fourth round.
The 19-year-old had never registered a win over a top ten player until now, but produced some stylish tennis to battle to a 6-2, 3-6, 6-2 success.
First Top 10 win ✅
First @BNPPARIBASOPEN quarterfinal ✅
Not a bad Tuesday for Marketa Vondrousova!
She tops Halep 6-2, 3-6, 6-2 pic.twitter.com/uoJLlhbs3W
— WTA (@WTA) March 12, 2019
Halep was not at her best, but there was little doubt that Vondrousova deserved the victory.
“I think I was fighting really well,” the Czech said in her on-court interview.
“It was a very tough match and I was running a lot, and sometimes I felt like I was dying, but I kept fighting every point.
“It’s an amazing week for me. It’s actually my first Top 10 win, and I’m just so happy to be through to the quarterfinals, and I’m so happy with my play, as well.
“I love the crowd and all the support here. I’m just enjoying my time here very much.”
It is likely to be a costly defeat for Halep, who looks set to drop in the rankings on Monday.
Elsewhere, Canada’s Bianca Andreescu, 18, continued her remarkable recent breakthrough with a 7-5, 6-2 win over China’s Wang Qiang.
She will now face Garbine Muguruza after the Spaniard was too good for Kiki Bertens.
Early end to Miami Open for Serena Williams.
LTA determined to open up access to tennis.
It’s a star-studded Saturday in Miami.
Strong WTA field emerging in Miami.
Thiem fails to make Sunshine Double challenge.
Williams admits to digging deep.
Serb cruises into round three.
Who can you see and when on Friday?
Spaniard still producing ahead of retirement.
Mixed day for former winners.